Digital notepad with changeable writing style

Abstract

A digital notepad which records not only the trace but also the style of the trace is provided. The digital notepad provides a set of dedicated writing tools, each of which would issue a predetermined radio signal representing the writing tool's pen color, pen style, and tool type. When a user uses one of the writing tools to write on a piece of paper in a designated area on the digital notepad, the writing tool issues the predetermined radio signal. The digital notepad could recognize the radio signal and store the relevant style information along with the trace data of the writing tool into a memory of the digital notepad, which later could be retrieved and reproduced on a computer.

1 . A digital notepad system comprising: 
 at least a writing tool which comprises a signal transmission circuit issuing an unique and pre-determined radio signal to a digital notepad of said digital notepad system;    a digital notepad comprising:    a signal reception circuit which receives and deciphers said radio signal of said writing tool into a style information about the pen color, pen style, and tool type of said writing tool;    a memory for storing a trace data along with said style information of said writing tool;    a memory management device for managing said trace data along with said style information stored in said memory; and    a status display for showing said style information of said writing tool; and    an application program comprising:    a recognition kernel for recognizing said trace data along with said style information stored in said memory;    a first conversion subprogram for converting a recognized data by said recognition kernel into various graphic formats; and    a second conversion subprogram for converting said recognized data by said recognition kernel into various file formats.    
   
   
       2 . The digital notepad system according to  claim 1 , wherein said style information is displayed in said status display using at least one of the following means: icons, text, and symbols, and with various colors.  
   
   
       3 . The digital notepad system according to  claim 1 , wherein said writing tool has a replaceable cartridge, said cartridge has a specific pen color and pen style, and said cartridge allows said writing tool to write on a normal piece of paper in a specific area of said digital notepad.  
   
   
       4 . The digital notepad system according to  claim 1 , wherein the definition of said radio signals of said writing tools is modifiable.